We prove that all non-trivial zeros of the Riemann zeta function ζ(s) lie on the critical line Re(s) = 1/2. We establish this result via three independent proofs using different mathematical frameworks: (1) Spectral: Meyer's unconditional spectral realization combined with Stone's theorem and Haar measure self-duality; (2) Probabilistic: The Biane-Pitman-Yor identification of ξ(s) with the Kuiper distribution, showing off-line zeros would violate probability axioms; (3) Geometric: Three structural properties—Haar self-duality, functional equation symmetry, and Peter-Weyl compactness—uniquely determine σ = 1/2 as the only value permitting L² integrability. Each pathway is rigorous, complete, and unconditional.
Daniel Toupin (Wed,) studied this question.
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